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CharBuffer clear() methods in Java with Examples

CharsetEncoder encode(CharBuffer in) method in Java with Examples

Last Updated : 10 Jan, 2022

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The encode(CharBuffer input) method is a built-in method of the java.nio.charset.CharsetEncoder which encodes the content which is remaining of a single input character buffer to a newly-allocated byte-buffer. The encode() method in itself implements an entire operation of encoding. This function should not be invoked if the operation is in progress. Syntax:

public final ByteBuffer encode(CharBuffer input)

Parameters: The function accepts a mandatory parameter input which specifies the input character buffer. Return Value: The function returns a newly-allocated byte buffer containing the result of the encoding operation. Error and Exceptions: The function throws four exceptions which can be described as below:

IllegalStateException: It is thrown if an encoding operation is already in progress.
MalformedInputException: It is thrown if the character sequence starting at the input buffer's current position is not a legal sixteen-bit Unicode sequence and the current malformed-input action is CodingErrorAction.REPORT.
UnmappableCharacterException: It is thrown if the character sequence starting at the input buffer's current position cannot be mapped to an equivalent byte sequence and the current unmappable-character action is CodingErrorAction.REPORT
CharacterCodingException

Below is the implementation of the above function: Program 1:

Java

// Java program to implement // the above function import java.nio.CharBuffer; import java.nio.charset.Charset; import java.nio.charset.CharsetEncoder;  public class Main {     public static void main(String[] args) throws Exception     {          // Gets the new encoder         CharsetEncoder encoder = Charset.forName("UTF8").newEncoder();          // Encodes         String res = "gfggfg";         System.out.println(encoder.encode(CharBuffer.wrap(res)));     } }

Output:

  java.nio.HeapByteBuffer[pos=0 lim=6 cap=6]

Program 2:

Java

// Java program to implement // the above function import java.nio.CharBuffer; import java.nio.charset.Charset; import java.nio.charset.CharsetEncoder;  public class Main {     public static void main(String[] args) throws Exception     {          // Gets the new encoder         CharsetEncoder encoder = Charset.forName("UTF16").newEncoder();          // Encodes         String res = "gopal";         System.out.println(encoder.encode(CharBuffer.wrap(res)));     } }

Output:

  java.nio.HeapByteBuffer[pos=0 lim=12 cap=21]

The exception programs cannot be demonstrated in programs. Reference: https://docs.oracle.com/javase/10/docs/api/java/nio/charset/CharsetEncoder.html#encode(java.nio.CharBuffer)

CharBuffer clear() methods in Java with Examples

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Article Tags :

Java
Java-Functions
Java-NIO package
Java-CharsetEncoder

Practice Tags :

Java

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